I've ridden in 45* and I'll say this... never again unless I have heated gear... just not worth it... your too busy being cold to enjoy the ride... and it's hard to stay focused when your freezing.
and 45* on a sport bike is different than 45* on a Touring bike... ( used to hear all the time how people rode in 37* weather no problem on their gold wings) and I don't wanna think about the naked bikes...
